Wrist – Digit I, Wrist – Digit II, Wrist – Digit III, Wrist – Digit IV

Surface Recording Technique, Antidromic Study
  • Giuliano Gentili
  • Mario Di Napoli

Original Settings

The machine used was a Dantec Counterpoint electromyograph. Sensitivity, low-frequency filter, high-frequency filter, sweep speed, duration of pulse, and rate of pulse were not specified.


This study was performed in the supine position.


Following the antidromic method [ 1], signals were recorded using surface saline-soaked Velcro ring electrodes placed distally to the digits from the proximal stimulation of the median nerve (S) at the wrist. Sensory nerve action potentials (SNAPs) were recorded from digit I (Fig. 1), digit II (Fig. 2), digit III (Fig. 3), and digit IV (Fig. 4). Active ring (A) electrode was placed over the metacarpal (MCP) of digit I, digit II, digit III, and digit IV; the reference ring (R) electrode was placed on the distal (R) interphalangeal joint of the same digits. Every wrist–digit recording was made separately. A 10 cm distance between the recording and stimulating electrodes was used for wrist–digit I test, and a 13 cm...


  1. 1.
    Kothari MJ, Rutkove SB, Caress JB et al (1995) Comparison of digital sensory studies in patients with carpal tunnel syndrome. Muscle Nerve 18:1272–1276PubMedCrossRefGoogle Scholar
  2. 2.
    Bland JDP (2000) A neurophysiological grading scale for carpal tunnel syndrome. Muscle Nerve 23:1280–1283PubMedCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Giuliano Gentili
    • 1
  • Mario Di Napoli
    • 1
  1. 1.Neurological ServiceS. Camillo de’ Lellis General HospitalRietiItaly

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